RT Journal Article
T1 Mineral phase discrimination of the chelyabinsk meteorite by LIBS mapping/cluster analysis
A1 Burgos-Palop, Clara
A1 García-Gómez, Laura
A1 Fortes-Román, Francisco Javier
A1 Vadillo-Pérez, José Miguel
A1 López-Ramírez, María Rosa
A1 Gritsevich, María
A1 Laserna-Vázquez, José Javier
K1 Espectroscopía de emisión atómica
K1 Espectroscopía de plasma inducido por láser
K1 Espectroscopía Raman
K1 Análisis cluster
AB The Chelyabinsk meteorite, resulting from one of the most extensively studied meteor events of the 21st century, was analyzed to investigate compositional heterogeneity across its inner matrix, fusion crust, and metallic inclusions using non-invasive techniques such as Laser-Induced Breakdown Spectroscopy (LIBS) and Raman spectroscopy, which allowed the preservation of the integrity of the sample. A high-resolution scanning micro- LIBS analysis was conducted to visualize the spatial heterogeneity of the meteorite at the micrometer scale. Unsupervised K-means clustering enabled segmentation of chemically distinct domains and correlation with major mineral phases identified by Raman spectroscopy, including olivine, pyroxene, chromite, and plagioclase. Calibration-Free LIBS (CF-LIBS) was applied to achieve semi-quantitative elemental analysis without the need for external calibration standards, yielding compositions consistent with LL-type ordinary chondrites and confirming the classification of the Chelyabinsk meteorite as an LL chondrite. The methodology demonstrated here highlights the utility of combining LIBS and Raman spectroscopy for non-destructive, high-resolution chemical and mineralogical characterization of meteorites, offering a valuable toolset for planetary science and meteoritic research.
PB Elsevier
YR 2025
FD 2025-11
LK https://hdl.handle.net/10630/40694
UL https://hdl.handle.net/10630/40694
LA eng
NO Burgos-Palop, C., García-Gómez, L., Fortes, F. J., Vadillo, J. M., López-Ramírez, M. R., Gritsevich, M., & Laserna, J. J. (2026). Mineral phase discrimination of the Chelyabinsk meteorite by LIBS mapping/cluster analysis. Talanta, 299, 129061. https://doi.org/10.1016/j.talanta.2025.129061
NO Disponible online desde el 3 de noviembre de 2025
NO Funding for open acces charge: Universidad de Málaga/CBUA
NO Ministerio Español de Ciencia, Innovación y Universidades
NO The program of development within Priority-2030
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 20 ene 2026